What is a stick pack machine?
A stick pack machine is automatic packaging equipment that forms, fills and seals slim single-serve packs from roll film. It makes the package and fills it on the same machine, so there is no premade pouch to buy or load. The product can be a powder, granule, liquid or gel. The main difference between those versions is the dosing unit and the parts that carry product to it; the film path, forming, sealing and cutting follow the same principle.
Related reading: Multi-Lane Stick Packaging Machines Compared; Stick Pack Sizes & Dimensions Guide
- Guide the film: unwind, register the print and slit the web.
- Form each strip into a tube and close the back seal.
- Dose into the tube after its bottom has been closed.
- Seal the top and cut; the next cycle repeats the closure.
- Inspect output by lane, including rejects and stops.
How does a stick pack machine work?
Film and product enter along separate paths and meet inside the forming tube. Film comes off the unwind stand, passes the registration sensor, is slit into lanes and wrapped around a forming tube on each lane, where the back seal closes it into a tube. On a typical back-seal machine the end-seal jaws close the bottom of the tube, the doser releases a measured portion into it, and the next end seal closes the top of that pack while forming the bottom of the next one. The cutter then separates the finished stick. The table follows that order and lists what to check at each step.
Coordination matters more than the speed of any single station. A fast doser is useful only when film feed, sealing and discharge keep pace, and product supply upstream or pack handling downstream can cap useful output while the machine keeps cycling. During a demonstration, follow both streams: where product enters, how it reaches each lane, where the film travels and what happens to the finished packs. That tells you more about real performance than watching the sealing jaws.
Scroll horizontally to see all columns. Keyboard: focus the table and use the arrow keys.
| Step | What happens | What to check |
|---|---|---|
| 1. Unwind | The roll is unwound under controlled tension and kept on track | Roll fit, winding direction and web tracking |
| 2. Registration | A sensor reads the printed mark to time each pack to the artwork | Mark position and print repeat against the pack length |
| 3. Slitting | The wide web is slit into one strip per lane | Strip width against the lane layout |
| 4. Forming | Each strip is folded around its forming tube | Forming parts matched to the pack drawing |
| 5. Back seal | A longitudinal seal closes the strip into a tube | Seal position and a clean seal zone |
| 6. Dosing | A measured portion drops or is pumped into the tube | Material-specific dosing method, lane by lane |
| 7. End seal and cut | Cross seals close each pack and the cutter separates it | Seal integrity, cut style and cut registration |
| 8. Discharge | Finished packs leave the machine together | Transfer to counting, conveying or cartoning |
Film unwinding and print registration
The film path starts at the unwind stand, where a roll of compatible film is mounted and guided toward the forming area, with tension and tracking controlled along the way. On printed film, the artwork has to line up with pack length and cut position. A registration sensor reads a printed mark on the web to hold that timing, provided the mark and print layout match what the machine expects, so check both against the machine's requirements before ordering printed rolls.
Inspect the roll path during a trial from outside the guarded areas. Ask the operator to show how rolls are loaded, how the correct winding direction is identified and how registration is set. Then look at packs from every lane for print that drifts or film that wrinkles. A fault that appears after a roll change points to a different cause than one that affects a single lane all the time, so log roll numbers and artwork revisions in the production record to separate material differences from setup differences.
Further reading: Check roll, artwork and registration inputs
How is film formed into multiple lanes?
Slitting blades cut the wide web into narrower strips, and each strip runs over a former that folds it around a forming tube, the hollow tube the product falls or flows through. The forming tube sets the finished width of the stick, which is why a different width needs a different forming set rather than a setting change. How web width, lane spacing, seal layout and finished pack relate to one another is specific to each platform, so check it against a dimensioned drawing before ordering printed film or change parts.
The powder and liquid equipment ranges use coordinated film movement and forming across multiple lanes. Ask which forming components are included in the quotation and which would change for a different width. Have the operator show threading and routine adjustments during the demonstration. Record the setup tasks and film used before the first acceptable packs, as both affect production after a format change.
Dosing powders, liquids and granules in each lane
Each lane receives a measured dose from a system chosen for the product. Powder configurations use an auger, and the auger and feed arrangement must suit the formulation, dose and flow behavior: a cohesive powder, an aerated one and a free-flowing blend can react differently to the same settings. In a trial, judge consistency lane by lane and over time, not from one combined sample.
Liquids and gels use a pump and nozzle matched to viscosity, temperature, particles and how the product behaves at the end of each dose. Test any anti-drip or shutoff feature with the real product instead of assuming it keeps every seal clean. Granules may use a volumetric or vibrating dosing option. Confirm it against your sample, including how particle size and blend separation are handled. A brochure that lists the product category says little; what counts is how the offered system performs with your material.
Related reading: Powder Stick Pack Machine: Auger Dosing; Liquid Stick Pack Machine for Gels; Granule Stick Pack Machine: Drink Mixes
Scroll horizontally to see all columns. Keyboard: focus the table and use the arrow keys.
| Product | Dosing per lane (reference configuration) | What to confirm with your sample |
|---|---|---|
| Powder | Servo auger filler | Flow, dust, dose range and lane-to-lane consistency |
| Liquid and gel | Piston or servo pump with a suck-back anti-drip nozzle | Viscosity, temperature, particles and drips at the nozzle |
| Granule | Volumetric cups or vibratory feeding | Particle size, flow and blend separation |
Longitudinal and end sealing
Each pack gets a longitudinal seal along its length and an end seal at each end, and both depend on film structure, machine setup and operating settings. Product that reaches the seal area interferes with closure, so powder handling, nozzle timing and film alignment matter as much as jaw temperature and timing. A defect that looks like a sealing problem can start upstream at the filler.
Watch the first packs after a stop and restart, since they can differ from steady-running output. Agree how finished seals will be evaluated, and keep samples labeled by lane and operating conditions. A good-looking seal is useful evidence, but it does not replace an agreed integrity check; a machine running smoothly on a demonstration floor has not shown that the package suits your product and distribution chain.
Cutting, coding and discharging finished packs
The cutter separates the sealed web into individual packs. Depending on the configuration, a project may add a particular cut style, a tear feature, a code printer or a counting station; each should appear as a line in the quotation rather than being assumed standard. Coordinate cutter position, artwork and the code area so the printed information stays readable and the pack tears open where intended.
At discharge, several lanes release packs at the same moment. Manual collection, counting, conveying or secondary packing all have to absorb that output without pileups or crushed packs. Ask who supplies and integrates the equipment between the stick pack machine and the next process; a clearly defined transfer point prevents two machines that each meet their own specification from failing to work as a line.
Further reading: Packaging World: stick pack collation and cartoning at PACK EXPO
How a liquid stick pack machine works differently
A liquid or gel stick pack machine follows the same film path, but the dose is pumped rather than dropped. In the reference configuration each lane has its own piston or servo pump, fed from a hopper or supply connection, and the dose leaves through a nozzle inside the forming tube. Viscous products can need a jacketed, heated and agitated hopper to keep them pumpable at a steady temperature.
The critical moment is the end of each dose. Liquid left hanging at the nozzle tip can drip or string onto the film where the end seal will form, and product in the seal area interferes with closure. Suck-back anti-drip nozzles draw the tail back into the outlet between doses, while pack length, fill volume and timing leave clear film for the end seal. How well that works depends on the formulation, so judge it on finished seals from every lane, including the first packs after a stop.
Cleaning and format also differ. Every part of the product path, from the hopper through pumps, hoses and valves to the nozzles, has to be drained and cleaned between products, which adds to changeover time. The reference liquid configuration makes sticks of about 1–30 ml, or four-side-seal sachets up to about 50 ml with different forming, sealing and cutting hardware, so confirm the format before ordering film.
Related reading: Liquid Stick Pack Machine for Gels; Energy Gel Stick Pack Machine
Main parts of a stick pack machine
A stick pack machine is built from a small number of stations, each with its own parts and adjustments. Knowing them helps you read a quotation, follow a demonstration and talk to the service team in the same terms. The table lists the stations in the order the film meets them. Coding, counting and conveying are added to this core and should appear as separate lines in a quotation.
On the powder reference configuration the frame is SUS304 stainless steel with 304 or 316L product-contact parts, and dust extraction and nitrogen flushing are listed as options; the liquid configuration offers a jacketed, heated and agitated hopper. Ask which of these are in your quotation, and request a parts list grouped by station. That list is the reference you will use when ordering wear parts or change parts later.
Related reading: Stick Pack Machine Spare & Change Parts
Scroll horizontally to see all columns. Keyboard: focus the table and use the arrow keys.
| Station | Main parts | What they do |
|---|---|---|
| Film unwind | Roll holder, tension control and web tracking control | Feed the film flat, at steady tension and centred on its path |
| Registration | Photo-eye mark sensor | Read the printed mark so seals and cuts line up with the artwork |
| Slitting | Slitting blades | Divide the wide web into one strip per lane |
| Forming | Former and forming tube for each lane | Fold each strip into a tube and set the finished width |
| Dosing | Hopper with an auger, a pump and nozzle, or a cup or vibratory feeder per lane | Deliver a measured portion into each tube |
| Sealing | Back-seal (longitudinal) sealer and end-seal (cross) jaws with temperature control | Close the tube along its length and at each end |
| Cutting | Cutter for straight, zig-zag or round-corner cuts, with tear-notch or perforation options | Separate the packs and form the opening feature |
| Control | PLC with touchscreen HMI, drives and temperature controllers | Coordinate film pull, dosing, sealing and cutting |
| Discharge | Outfeed chute or conveyor | Pass finished packs to counting, conveying or cartoning |
What to watch in a stick pack machine video or live run
A video of a stick pack machine running is useful when you know which part of the cycle each shot shows. Many clips focus on the sealing jaws and the falling packs, which look much the same on every machine. The segments below follow the sequence in this guide and say what each one can show, whether you are watching a recording or a live demonstration.
Ask for footage of the configuration being quoted, running your product or the closest material the supplier has tested, with the lane count, film and dose stated. A clip without those conditions shows that a machine moves, not that it will pack your product. If you arrange a sample trial, agree in advance whether you will attend or receive photographs and video, and which of these segments the recording must cover.
Related reading: Stick Pack Machine Sample Testing
Further reading: Plan measurements and acceptance evidence
- Overview: the whole machine from the unwind stand to the outfeed, showing the lane count and what is supplied around it
- Film path: roll loading, the registration sensor and the web passing the slitting blades without wandering
- Forming and back seal: each strip closing around its forming tube with a straight, clean back seal
- Dosing: product entering every lane and, for liquids, a close view of the nozzle tip at the end of each dose
- End seal and cut: the jaws closing and the cutter separating packs, with the cut landing in the same place on the print
- Discharge: packs from all lanes leaving together and being collected without pile-ups
- Stop and restart: the first packs after a pause, which reveal more than a steady run
- Finished packs: samples from each lane opened, checked and weighed, on camera or in a written record
Scroll horizontally to see all columns. Keyboard: focus the table and use the arrow keys.
| Record | Entry | Evidence |
|---|---|---|
| Product / dose / active lanes | ______ | ______ |
| Film / pack drawing / revisions | ______ | ______ |
| Elapsed and running time | ______ | ______ |
| Stops / rejects / accepted packs | ______ | ______ |
| Lane samples / recording segment | ______ | ______ |
Is cycle speed the same as accepted output?
A machine cycle creates one pack position per active lane. Nominal output is cycle rate multiplied by active lanes, while accepted output is the count of finished packs meeting the agreed checks over elapsed time. Record cycle count, active lanes, stops and rejects separately so the process record connects machine motion to useful production.
Define an accepted pack and the measurement period before comparing rates. Record product, dose, film, active lanes and the reason for each stop or reject. State whether the period includes roll changes, hopper refills and changeover. This lets you compare equivalent runs and identify which stage limits output. Keep short demonstration results separate from estimates for a full production shift.
Further reading: Compare lane counts over the same production window
Stick pack machine buying checklist by stage
Walk through the proposed sequence and mark the interfaces on the machine drawing: product arrival, web entry, dosing outlet, closure, cut and discharge. Assign the feeding and collection tasks to the equipment or plant scope. This connects each stage to its utility, cleaning and operator-access requirements before the layout is finalized.
Before acceptance, agree a representative run and the records needed: fill results by lane, seal checks, print registration, stop reasons and accepted output. Request the manuals, drawings and parts list for the supplied configuration. Agree sample quantities and handling arrangements before dispatching trial materials.
Related reading: Stick Pack Machine Price: Budget & Quote Guide
Discuss this configuration
Discuss on WhatsAppCalculate nominal and accepted pack output
Nominal positions per minute = active lanes × cycles per minute. The four-lane powder reference runs about 30–40 cycles/min per lane, corresponding to 4 × (30–40) = 120–160 nominal sticks/min. This count describes how the machine cycle creates pack positions. Filling, sealing and downstream checks determine which finished packs enter accepted production.
For a measured interval, accepted rate = accepted finished packs / elapsed minutes. A production model can also use active lanes × running cycle rate × running minutes × accepted fraction. Record running minutes and stopped minutes within the same elapsed window, and compare the calculation with the counted finished packs. When an elapsed accepted rate is already used, it already contains those stops and rejects.
Common Questions
What does the former on a stick pack machine do?
The former and its forming tube fold the flat strip of film for one lane into a tube around the filling path, and they set the finished stick width. A different width needs a different forming set, so check which formers come with the machine before ordering film for a new size.
What does the registration mark on stick pack film do?
The registration mark is a printed mark that a sensor on the machine reads to keep the artwork aligned with pack length and cut position. If the mark is missing, faint or placed where the machine does not expect it, the print drifts from pack to pack, so confirm its position before ordering printed rolls.
Why do stick pack seals fail?
Seal failures trace back to the film structure, the jaw settings or product reaching the seal area. Powder dust and liquid dripping from the nozzle are typical upstream causes, so a seal defect should be investigated at the filler as well as at the jaws. Judge seals with an agreed integrity check, not appearance alone.
Can one stick pack machine run both powder and liquid?
Not without changing the dosing system. Powders are dosed by an auger and liquids by a pump and nozzle, and each route has its own product path, cleaning needs and often a different pack format. A machine is quoted for the dosing route of the product it will run, so if you plan to pack both, say so at the enquiry stage and the team can review what each product needs.